NocOno is a rare Runeword created by combining a Noc Rune of Ritual and a Ono Rune of Invocation.
How to Create NocOno
You can create NocOno by adding the rare Noc Rune of Ritual and the magic Ono Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Noc - Inflict a Crowd Control that isn't Slow or Chill. (10)
Ono - Invoke the Druid's Dancing Bolts, seeking and dealing damage to enemies. (25)
Overflow
When NocOno overflows, you receive the Ono Rune's overflow effect (Increased Bolts Spawned) 0.2 times.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.